CN110961875A - Aluminum alloy rear cover of mobile phone and manufacturing process thereof - Google Patents
Aluminum alloy rear cover of mobile phone and manufacturing process thereof Download PDFInfo
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- CN110961875A CN110961875A CN202010027525.XA CN202010027525A CN110961875A CN 110961875 A CN110961875 A CN 110961875A CN 202010027525 A CN202010027525 A CN 202010027525A CN 110961875 A CN110961875 A CN 110961875A
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- aluminum alloy
- die
- base material
- mobile phone
- rear cover
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
- H04M1/0279—Improving the user comfort or ergonomics
- H04M1/0283—Improving the user comfort or ergonomics for providing a decorative aspect, e.g. customization of casings, exchangeable faceplate
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/18—Telephone sets specially adapted for use in ships, mines, or other places exposed to adverse environment
- H04M1/185—Improving the shock resistance of the housing, e.g. by increasing the rigidity
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- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Mechanical Engineering (AREA)
- Electroplating Methods And Accessories (AREA)
- Telephone Set Structure (AREA)
Abstract
The invention discloses a manufacturing process of an aluminum alloy mobile phone rear cover, which comprises the following steps: step 1, cutting the aluminum alloy plate into a die-casting aluminum alloy base material; step 2, polishing the surface of the die-casting aluminum alloy base material after polishing; step 3, manufacturing a printing screen, arranging the screen on the surface of the die-casting aluminum alloy base material, and printing ink and silk-screen at least one icon in a partial area of the surface of the die-casting aluminum alloy base material; step 4, performing film pasting protection on the ink screen printing area; step 5, sand blasting is carried out on the area, which is not subjected to silk screen printing, on the surface of the die-casting aluminum alloy base material; step 6, tearing off the protective film and removing the printing ink; and 7, electroplating the surface of the die-casting aluminum alloy substrate after ink removal by using the special electroplating bath solution for aluminum alloy. The invention realizes the sand feeling and has the highlight icon, and the icon is protected by the protective film, so that the highlight effect of the icon subsequently processed on the rear cover of the mobile phone is better, the appearance of the product is beautiful, the visual impact force is strong, and the brand promotion effect is good.
Description
Technical Field
The invention relates to the technical field of mobile phone rear covers, in particular to an aluminum alloy mobile phone rear cover manufacturing process and a mobile phone rear cover.
Background
In the present day that the market of mobile phones is increasingly expanded, the competition of processing the rear covers of mobile phones is increased, and each large mobile phone company continuously develops new processes, and hopes to adopt the new processes to reduce the production cost so as to improve the market competitiveness of the company. The surface of the existing mobile phone rear cover needs to form an icon and be subjected to surface treatment, so that the mobile phone rear cover has the functions of displaying brands, publicizing manufacturers, beautifying products and the like. The existing mobile phone rear cover needs surface pretreatment to ensure that an icon with good appearance effect can be obtained by ink silk screen printing, the pretreatment in the existing process comprises the steps of carrying out anodic oxidation, laser etching, corrosion and acid etching on an aluminum alloy base body in sequence, a die-cast aluminum base material can only be used for making the icon through the laser etching and is limited by the laser etching process, the icon can only be made into yellow, black, gray and the like, a highlight icon cannot be obtained, the mobile phone rear cover product has poor appearance, the icon cannot play the roles of attracting attention and showing a brand, the existing icon is not protected during processing, partial impurities are easily caused to enter the icon during carrying or other processes such as (sand blasting process) processing, the icon appearance is influenced, and the quality of the product is influenced.
Disclosure of Invention
The invention provides a manufacturing process of an aluminum alloy mobile phone rear cover aiming at the technical defects at present.
The invention also provides a mobile phone rear cover.
The technical scheme adopted by the invention for realizing the purpose is as follows:
a manufacturing process of an aluminum alloy mobile phone rear cover comprises the following steps:
step 3, manufacturing a printing screen, arranging the screen on the surface of the die-casting aluminum alloy base material, and printing ink and silk-screen at least one icon in a partial area of the surface of the die-casting aluminum alloy base material;
step 4, performing film pasting protection on the ink screen printing area;
step 5, sand blasting is carried out on the area, which is not subjected to silk screen printing, on the surface of the die-casting aluminum alloy base material to form a sand grain effect;
step 6, tearing off the protective film and removing the printing ink;
step 7, electroplating the surface of the die-casting aluminum alloy substrate after ink removal by using special electroplating bath solution for aluminum alloy;
and 8, carrying out CNC machining treatment, namely machining the surface-treated die-casting aluminum alloy base material through CNC equipment to obtain a finished product of the rear cover of the mobile phone.
In a further improvement, the manufacturing and printing process of step 4 includes the following steps:
step 4.1, transporting the die-casting aluminum alloy base material subjected to ink screen printing to automatic film pasting equipment, and shooting and detecting an ink screen printing area through a visual detection system;
4.2, a cutting mechanism is arranged in the automatic film sticking equipment and used for cutting the protective film according to the size of the ink screen printing area;
and 4.3, attaching the protective film with the consistent size of the ink screen printing area on the ink screen printing area.
In a further improvement, the electroplating process in step 7 comprises the following steps:
7.1, performing an oil removal process on the surface of the die-casting aluminum alloy base material after ink removal to remove grease on the surface of the die-casting aluminum alloy base material;
7.2, carrying out alkaline etching to dissolve an oxide film attached to the surface of the die-casting aluminum alloy base material;
7.3, acid activation is carried out, and impurities adhered to the surface of the die-casting aluminum alloy base material are removed;
7.4, depositing zinc to form a plating layer;
step 7.5, nickel plating, namely forming a nickel layer on the surface of the die-casting aluminum alloy base material;
step 7.6, performing chromium polishing to form a chromium layer;
and 7.7, drying.
In a further improvement, at least one water washing process is arranged between every two steps from step 7.1 to step 7.7.
In a further improvement, in step 7.4, the zinc deposition comprises the following specific steps:
7.4.1, depositing zinc for the first time, and removing an oxide film on the aluminum alloy base material;
step 7.4.2, washing with water;
7.4.3, dezincing, and removing a rough porous structure formed by primary zinc deposition;
step 7.4.4, washing with water;
and 7.4.5, depositing zinc for the second time to improve the quality of the plating layer.
In step 7.5, the nickel plating comprises the following specific steps:
step 7.5.1, plating chemical nickel to form a chemical nickel layer;
step 7.5.2, washing with water;
step 7.5.3, plating semigloss nickel to form a semigloss nickel layer;
step 7.5.4, washing with water;
step 7.5.5, plating acid copper to form an acid copper layer;
step 7.5.6, washing with water;
step 7.5.7, plating semigloss nickel to form a semigloss nickel layer;
step 7.5.8, washing with water;
and 7.5.9, plating the matte nickel to form a matte nickel layer.
In step 7.5.1, the electroplating solution for forming the chemical nickel layer is 141g/L nickel sulfate, and the electroplating time is 8-10 minutes.
In step 5, the area of the surface of the die-casting aluminum alloy substrate which is not subjected to silk-screen printing is subjected to sand blasting by using 150-220 zircon sand.
A mobile phone rear cover is an aluminum alloy base material obtained by the manufacturing process of the aluminum alloy mobile phone rear cover, the aluminum alloy base material is provided with a highlight icon, and at least a chemical nickel layer, a semi-gloss nickel layer, a copper acid layer, a nickel-phosphorus layer, a matte nickel layer and a chromium layer are sequentially formed on one side surface of the aluminum alloy base material.
The invention has the beneficial effects that: the invention utilizes the silk-screen process to manufacture the icons, replaces the existing laser engraving process, realizes the sand feeling and has high-brightness icons after the die-casting aluminum alloy is electroplated, and has beautiful product appearance, strong visual impact force and good brand promotion effect; carry out the pad pasting protection through setting up automatic pad pasting equipment with the region of printing ink silk screen printing to prevent that transport or other processes from leading to the fact the influence to the region of printing ink silk screen printing man-hour like (sandblast process), thereby subsequent processing of product protects the icon outward appearance, improves the subsequent processingquality of product, thereby the product quality of improvement, it is better to make the high bright effect of lid icon behind the cell-phone, thereby play fine show brand, propaganda firm, beautify effects such as product.
The invention is further described with reference to the following detailed description and accompanying drawings.
Drawings
Fig. 1 is a schematic view of a process flow for manufacturing a rear cover of an aluminum alloy mobile phone in the embodiment;
fig. 2 is a schematic view of the die-cast aluminum alloy substrate of the embodiment after an icon is printed on the surface of the die-cast aluminum alloy substrate by silk;
fig. 3 is a schematic view of the die-cast aluminum alloy substrate of the embodiment after sand blasting of the non-screen-printed area on the surface;
FIG. 4 is a schematic view showing the die-cast aluminum alloy substrate of the present embodiment after ink is removed from the surface;
FIG. 5 is a schematic view showing a state after plating of the surface of the aluminum die-cast alloy base material according to the present embodiment;
fig. 6 is a schematic cross-sectional view of the rear cover of the mobile phone in this embodiment.
In the figure: 1. the high-brightness nickel-based coating comprises an aluminum alloy substrate, 2. highlight icons, 3. a chemical nickel layer, 4. a semi-gloss nickel layer, 5. a copper acid layer, 6. a nickel phosphorus layer, 7. a matte nickel layer and 8. a chromium layer.
Detailed Description
The following description is only a preferred embodiment of the present invention, and does not limit the scope of the present invention.
In the embodiment, referring to fig. 1 to 6, a process for manufacturing a rear cover of an aluminum alloy mobile phone includes the following steps:
step 3, manufacturing a printing screen, arranging the screen on the surface of the die-casting aluminum alloy base material, and printing ink and silk-screen at least one icon in a partial area of the surface of the die-casting aluminum alloy base material;
step 4, performing film pasting protection on the ink screen printing area;
step 5, sand blasting is carried out on the area, which is not subjected to silk screen printing, on the surface of the die-casting aluminum alloy base material to form a sand grain effect;
step 6, tearing off the protective film and removing the printing ink;
step 7, electroplating the surface of the die-casting aluminum alloy substrate after ink removal by using special electroplating bath solution for aluminum alloy;
and 8, carrying out CNC machining treatment, namely machining the surface-treated die-casting aluminum alloy base material through CNC equipment to obtain a finished product of the rear cover of the mobile phone.
The manufacturing and printing process of the step 4 comprises the following steps:
step 4.1, transporting the die-casting aluminum alloy base material subjected to ink screen printing to automatic film pasting equipment, and shooting and detecting an ink screen printing area through a visual detection system;
4.2, a cutting mechanism is arranged in the automatic film sticking equipment and used for cutting the protective film according to the size of the ink screen printing area;
and 4.3, attaching the protective film with the consistent size of the ink screen printing area on the ink screen printing area.
The electroplating process in step 7 comprises the following steps:
7.1, performing an oil removal process on the surface of the die-casting aluminum alloy base material after ink removal to remove grease on the surface of the die-casting aluminum alloy base material;
7.2, carrying out alkaline etching to dissolve an oxide film attached to the surface of the die-casting aluminum alloy base material;
7.3, acid activation is carried out, and impurities adhered to the surface of the die-casting aluminum alloy base material are removed;
7.4, depositing zinc to form a plating layer;
step 7.5, nickel plating, namely forming a nickel layer on the surface of the die-casting aluminum alloy base material;
step 7.6, performing chromium polishing to form a chromium layer;
and 7.7, drying.
From step 7.1 to step 7.7, at least one water washing process is arranged between every two steps.
In step 7.4, the zinc deposition comprises the following specific steps:
7.4.1, depositing zinc for the first time, and removing an oxide film on the aluminum alloy base material;
step 7.4.2, washing with water;
7.4.3, dezincing, and removing a rough porous structure formed by primary zinc deposition;
step 7.4.4, washing with water;
and 7.4.5, depositing zinc for the second time to improve the quality of the plating layer.
In step 7.5, the nickel plating comprises the following specific steps:
step 7.5.1, plating chemical nickel to form a chemical nickel layer;
step 7.5.2, washing with water;
step 7.5.3, plating semigloss nickel to form a semigloss nickel layer;
step 7.5.4, washing with water;
step 7.5.5, plating acid copper to form an acid copper layer;
step 7.5.6, washing with water;
step 7.5.7, plating semigloss nickel to form a semigloss nickel layer;
step 7.5.8, washing with water;
and 7.5.9, plating the matte nickel to form a matte nickel layer.
In step 7.5.1, the electroplating solution used for forming the chemical nickel layer is 141g/L nickel sulfate, and the electroplating time is 8-10 minutes.
In step 5, 150- "220" zircon sand is used for sand blasting of the area of the surface of the die-casting aluminum alloy substrate, which is not subjected to silk printing.
The utility model provides a lid behind cell-phone, lid behind cell-phone includes aluminum alloy substrate 1, utilizes above-mentioned aluminum alloy substrate 1 that lid preparation technology obtained behind cell-phone, aluminum alloy substrate 1 has highlight icon 2, forms chemical nickel layer 3, half gloss nickel layer 4, acid copper layer 5, nickel phosphorus layer 6, dull nickel layer 7 and chromium layer 8 on one side surface of aluminum alloy substrate 1 at least in proper order.
The invention utilizes the silk-screen process to manufacture the icons, replaces the existing laser engraving process, realizes the sand feeling and has high-brightness icons after the die-casting aluminum alloy is electroplated, and has beautiful product appearance, strong visual impact force and good brand promotion effect; carry out the pad pasting protection through setting up automatic pad pasting equipment with the region of printing ink silk screen printing to prevent that transport or other processes from leading to the fact the influence to the region of printing ink silk screen printing man-hour like (sandblast process), thereby subsequent processing of product protects the icon outward appearance, improves the subsequent processingquality of product, thereby the product quality of improvement, it is better to make the high bright effect of lid icon behind the cell-phone, thereby play fine show brand, propaganda firm, beautify effects such as product.
The present invention is not limited to the above embodiments, and other processes for manufacturing the aluminum alloy mobile phone back cover and the mobile phone back cover obtained by the same or similar method or process as the above embodiments of the present invention are within the protection scope of the present invention.
Claims (9)
1. A manufacturing process of an aluminum alloy mobile phone rear cover is characterized by comprising the following steps:
step 1, cutting the aluminum alloy plate into a die-casting aluminum alloy base material;
step 2, polishing the surface of the die-casting aluminum alloy base material after polishing, and presenting a mirror surface bright effect;
step 3, manufacturing a printing screen, arranging the screen on the surface of the die-casting aluminum alloy base material, and printing ink and silk-screen at least one icon in a partial area of the surface of the die-casting aluminum alloy base material;
step 4, performing film pasting protection on the ink screen printing area;
step 5, sand blasting is carried out on the area, which is not subjected to silk screen printing, on the surface of the die-casting aluminum alloy base material to form a sand grain effect;
step 6, tearing off the protective film and removing the printing ink;
step 7, electroplating the surface of the die-casting aluminum alloy substrate after ink removal by using special electroplating bath solution for aluminum alloy;
and 8, carrying out CNC machining treatment, namely machining the surface-treated die-casting aluminum alloy base material through CNC equipment to obtain a finished product of the rear cover of the mobile phone.
2. The process for manufacturing the rear cover of the aluminum alloy mobile phone and the rear cover of the mobile phone as claimed in claim 1, wherein the manufacturing and printing process of the step 4 comprises the following steps:
step 4.1, transporting the die-casting aluminum alloy base material subjected to ink screen printing to automatic film pasting equipment, and shooting and detecting an ink screen printing area through a visual detection system;
4.2, a cutting mechanism is arranged in the automatic film sticking equipment and used for cutting the protective film according to the size of the ink screen printing area;
and 4.3, attaching the protective film with the consistent size of the ink screen printing area on the ink screen printing area.
3. The manufacturing process of the aluminum alloy mobile phone rear cover and the mobile phone rear cover as claimed in claim 2, wherein the electroplating process in the step 7 comprises the following steps:
7.1, performing an oil removal process on the surface of the die-casting aluminum alloy base material after ink removal to remove grease on the surface of the die-casting aluminum alloy base material;
7.2, carrying out alkaline etching to dissolve an oxide film attached to the surface of the die-casting aluminum alloy base material;
7.3, acid activation is carried out, and impurities adhered to the surface of the die-casting aluminum alloy base material are removed;
7.4, depositing zinc to form a plating layer;
step 7.5, nickel plating, namely forming a nickel layer on the surface of the die-casting aluminum alloy base material;
step 7.6, performing chromium polishing to form a chromium layer;
and 7.7, drying.
4. The process for manufacturing the rear cover of the aluminum alloy mobile phone according to claim 2, wherein at least one water washing process is arranged between every two steps from step 7.1 to step 7.7.
5. The manufacturing process of the rear cover of the aluminum alloy mobile phone according to claim 2, wherein in the step 7.4, the zinc deposition comprises the following specific steps:
7.4.1, depositing zinc for the first time, and removing an oxide film on the aluminum alloy base material;
step 7.4.2, washing with water;
7.4.3, dezincing, and removing a rough porous structure formed by primary zinc deposition;
step 7.4.4, washing with water;
and 7.4.5, depositing zinc for the second time to improve the quality of the plating layer.
6. The manufacturing process of the aluminum alloy mobile phone rear cover according to claim 2, wherein in the step 7.5, the nickel plating comprises the following specific steps:
step 7.5.1, plating chemical nickel to form a chemical nickel layer;
step 7.5.2, washing with water;
step 7.5.3, plating semigloss nickel to form a semigloss nickel layer;
step 7.5.4, washing with water;
step 7.5.5, plating acid copper to form an acid copper layer;
step 7.5.6, washing with water;
step 7.5.7, plating semigloss nickel to form a semigloss nickel layer;
step 7.5.8, washing with water;
and 7.5.9, plating the matte nickel to form a matte nickel layer.
7. The process for manufacturing the rear cover of the aluminum alloy mobile phone as claimed in claim 5, wherein in step 7.5.1, the electroplating solution for forming the chemical nickel layer is 141g/L nickel sulfate, and the electroplating time is 8-10 minutes.
8. The process for manufacturing the rear cover of the aluminum alloy mobile phone as claimed in claim 1, wherein in the step 5, the non-silk-screen area on the surface of the die-cast aluminum alloy substrate is blasted with No. 150-220 zircon sand.
9. A mobile phone rear cover, comprising: the aluminum alloy base material obtained by the manufacturing process of the rear cover of the aluminum alloy mobile phone as claimed in any one of claims 1 to 8, wherein the aluminum alloy base material is provided with a highlight icon, and at least a chemical nickel layer, a semi-gloss nickel layer, a copper acid layer, a nickel-phosphorus layer, a matte nickel layer and a chromium layer are sequentially formed on one side surface of the aluminum alloy base material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010027525.XA CN110961875A (en) | 2020-01-10 | 2020-01-10 | Aluminum alloy rear cover of mobile phone and manufacturing process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202010027525.XA CN110961875A (en) | 2020-01-10 | 2020-01-10 | Aluminum alloy rear cover of mobile phone and manufacturing process thereof |
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| CN110961875A true CN110961875A (en) | 2020-04-07 |
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| CN202010027525.XA Pending CN110961875A (en) | 2020-01-10 | 2020-01-10 | Aluminum alloy rear cover of mobile phone and manufacturing process thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112626586A (en) * | 2020-12-07 | 2021-04-09 | 苏州胜利精密制造科技股份有限公司 | Processing technology of aluminum alloy product with high-brightness LOGO surface |
| CN113814659A (en) * | 2021-09-15 | 2021-12-21 | 浙江牛钮电气有限公司 | Machining process of button switch shell and die-casting die thereof |
-
2020
- 2020-01-10 CN CN202010027525.XA patent/CN110961875A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112626586A (en) * | 2020-12-07 | 2021-04-09 | 苏州胜利精密制造科技股份有限公司 | Processing technology of aluminum alloy product with high-brightness LOGO surface |
| CN113814659A (en) * | 2021-09-15 | 2021-12-21 | 浙江牛钮电气有限公司 | Machining process of button switch shell and die-casting die thereof |
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